CN104049325A - Semiconductor laser array output beam uniformizing and optical fiber coupling system - Google Patents
Semiconductor laser array output beam uniformizing and optical fiber coupling system Download PDFInfo
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- CN104049325A CN104049325A CN201410045318.1A CN201410045318A CN104049325A CN 104049325 A CN104049325 A CN 104049325A CN 201410045318 A CN201410045318 A CN 201410045318A CN 104049325 A CN104049325 A CN 104049325A
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Abstract
The invention discloses a semiconductor laser array output beam uniformizing and optical fiber coupling system which comprises a plurality of semiconductor laser units arranged in parallel to form a one-dimension semiconductor laser array, fast axis collimating lenses and slow axis collimating lenses, wherein each fast axis collimating lens and each slow axis collimating lens are arranged at the front end of the corresponding semiconductor laser unit in a front and rear mode. An output beam of each semiconductor laser unit passes through the corresponding fast axis collimating lens and the corresponding slow axis collimating lens, then passes through a prism pile in the z direction perpendicular to the x direction and is horizontally moved in the y direction. The prism pile is formed by a plurality of prism sheets, and the number of the prism sheets is identical with that of the semiconductor laser units. The output beam of each semiconductor laser unit passes through the prism pile and then passes through a redirecting optical device and a focusing device in the z direction respectively, and each focused beam is coupled into an output optical fiber.
Description
Technical field
The present invention relates to a kind of semiconductor laser array well-balancedization of output beam and fiber coupling system.
Background technology
The arragement direction of laser instrument of take is x axle, because semiconductor laser one-dimensional array is at x direction width (being generally 10 millimeters) and beam divergence angle (being generally 8-12 °) and very large at y direction height (being approximately 1 micron) and beam divergence angle (being generally 30-60 °) difference, coupling fiber is more difficult.Traditional way adopts the optical fiber identical with number of lasers to assemble a fibre bundle.During coupling before semiconductor laser array in parallel placement one fast axis collimation lens of x direction, optical fiber is aimed at one by one with each semiconductor laser, the output light of each semiconductor laser is coupled in each optical fiber of fibre bundle one by one.The shortcoming of this method is because the face area of fibre bundle is large, and the output energy in unit area is low.
Conventionally the method adopting for the energy improving on optical fiber output unit area is the output beam of semiconductor laser array to be adopted in x direction an optical device cut apart, make the light beam of separating in y direction, produce dislocation simultaneously, by another optical device, respectively the light beam of each separation is superposeed in y direction, after rearrangement, obtain well-balancedization hot spot in x-y plane, by focus device, be coupled into an optical fiber.The shortcoming of this method be will be the luminous size of all semiconductor lasers and two contiguous semiconductor lasers in x direction when considering that light beam is separated number between non-light-emitting area domain sizes all count, the energy raising on optical fiber output unit area is had to certain limitation.
Summary of the invention
For the problems referred to above, the invention provides a kind of semiconductor laser one-dimensional array well-balancedization of output beam and fiber coupling system.
For achieving the above object, a kind of semiconductor laser array well-balancedization of output beam of the present invention and fiber coupling system, described system comprises that equidistant parallel arrangement is some semiconductor lasers of one-dimensional array, the arragement direction of described laser instrument of take is x axle, perpendicular to described laser array arragement direction, be z axle, the light beam of described laser instrument output transmits along z direction of principal axis;
Described system also comprises fast axis collimation lens, slow axis collimation lens, the edge glass stack that described laser instrument device front end sets gradually and again points to the condenser lens that again points to the beam outlet of optical device described in optical device and correspondence, the beam outlet of described condenser lens is provided with optical fiber, wherein
Described fast axis collimation lens, for carrying out the light beam of laser instrument output described in each collimation on y direction of principal axis and by the parallel output of described light beam;
Described slow axis collimation lens, for carrying out the described light beam of described fast axis collimation lens output collimation on x direction of principal axis and by the parallel output of described light beam;
Described edge glass stack, for the described light beam of described slow collimation lens output is carried out being offset in y-z plane, and export described light beam, wherein the described light beam of parallel arrangement is divided into three parts, there is not skew output at y direction of principal axis in the light beam of center section, rightabout skew output occurs the light beam of two side portions;
The described optical device that again points to, for the described light beam of described rib lens output is carried out to the deflection of equal angular in x direction, the light beam that output overlaps on x direction of principal axis, described light beam at x-z with all parallel in y-z plane;
Described condenser lens, for the described described light beam that again points to optical device output is polymerized to a focus, described focus is inputted described optical fiber.
Further, described fast axis collimation lens comprises into the collimation post lens that one-dimensional array is arranged, and wherein, described main laser is placed with respectively collimation post lens separately with the front end of sub-laser instrument described in each.
Further, described slow axis collimation lens comprises into the sub-post lens that one-dimensional array is arranged, and wherein, described main laser is placed with respectively post lens separately with the front end of sub-laser instrument described in each.
Further, the described optical device that again points to comprises stepped base, on each ladder of described base, be provided with a prism, described prism and described light beam are corresponding one by one, described prism carries out the deflection on x direction of principal axis by described light beam, the light beam that output overlaps on x direction of principal axis, described light beam at x-z with all parallel in y-z plane.
Further, the described optical device that again points to comprises stepped base, on each ladder of described base, be provided with a catoptron, described catoptron and described light beam are corresponding one by one, described catoptron carries out the deflection on x direction of principal axis by described light beam, the light beam that output overlaps on x direction of principal axis, described light beam at x-z with all parallel in y-z plane.
Further, the end face of described optical fiber is plane, hemisphere face, circular conical surface.
Beneficial effect of the present invention:
In the present invention, each prism of edge glass stack can be controlled the side-play amount of corresponding Laser Output Beam on y direction of principal axis by interior angle and the length of prism, can compensate to a certain extent the output beam that caused by semiconductor laser one-dimensional array paster process and the fast axis collimation lens regulating error buckling phenomenon in x direction, output beam carry out well-balancedization.
The present invention need not consider two non-luminous regions between adjacent semiconductor laser instrument when conductor laser one-dimensional array is carried out to well-balancedization of light beam, position by edge glass stack collimation output beam after slow axis collimation lens to each independent laser instrument rearranges, make as far as possible output beam superpose with high density at y direction of principal axis, energy density and brightness after well-balancedization of raising light beam in unit area, allow light beam coupling to enter in the optical fiber of a little core diameter.
Accompanying drawing explanation
Fig. 1 is semiconductor laser one-dimensional array well-balancedization of light beam in x-z plane and the coupling fiber schematic diagram of a kind of semiconductor laser array well-balancedization of output beam of the present invention and fiber coupling system;
Fig. 2 is semiconductor laser one-dimensional array well-balancedization of light beam in y-z plane and the coupling fiber schematic diagram of a kind of semiconductor laser array well-balancedization of output beam of the present invention and fiber coupling system;
Fig. 3 is the vertical view of the edge glass stack of a kind of semiconductor laser array well-balancedization of output beam of the present invention and fiber coupling system;
Fig. 4 is the side view of the edge glass stack of of the present invention a kind of semiconductor laser array well-balancedization of output beam and fiber coupling system;
Fig. 5 is the vertical view that again points to optical device based on reflecting prism of of the present invention a kind of semiconductor laser array well-balancedization of output beam and fiber coupling system;
Fig. 6 is the side view that again points to optical device based on reflecting prism of of the present invention a kind of semiconductor laser array well-balancedization of output beam and fiber coupling system;
Fig. 7 is the vertical view that again points to optical device based on catoptron of of the present invention a kind of semiconductor laser array well-balancedization of output beam and fiber coupling system;
Fig. 8 is the side view that again points to optical device based on catoptron of of the present invention a kind of semiconductor laser array well-balancedization of output beam and fiber coupling system.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described.
A kind of semiconductor laser array well-balancedization of output beam of the present invention and fiber coupling system, described system comprises that equidistant parallel arrangement is some semiconductor lasers of one-dimensional array, the arragement direction of described laser instrument of take is x axle, perpendicular to described laser array arragement direction, be z axle, the light beam of described laser instrument output transmits along z direction of principal axis;
Described system also comprises fast axis collimation lens, slow axis collimation lens, the edge glass stack that described laser instrument device front end sets gradually and again points to the condenser lens that again points to the beam outlet of optical device described in optical device and correspondence, the beam outlet of described condenser lens is provided with optical fiber, wherein
Described fast axis collimation lens, for carrying out the light beam of laser instrument output described in each collimation on y direction of principal axis and by the parallel output of described light beam;
Described slow axis collimation lens, for carrying out the described light beam of described fast collimation lens output collimation on x direction of principal axis and by the parallel output of described light beam;
Described edge glass stack, for the described light beam of described slow collimation lens output is carried out being offset in y-z plane, and export described light beam, wherein the described light beam of parallel arrangement is divided into three parts, there is not skew output at y direction of principal axis in the light beam of center section, rightabout skew output occurs the light beam of two side portions;
The described optical device that again points to, for the described light beam of described rib lens output is carried out to the deflection of equal angular in x direction, the light beam that output overlaps on x direction of principal axis, described light beam at x-z with all parallel in y-z plane;
Described condenser lens, for the described described light beam that again points to optical device output is polymerized to a focus, described focus is inputted described optical fiber.
Further, described fast axis collimation lens comprises into the collimation post lens that one-dimensional array is arranged, and wherein, described main laser is placed with respectively collimation post lens separately with the front end of sub-laser instrument described in each.
Further, described slow axis collimation lens comprises into the sub-post lens that one-dimensional array is arranged, and wherein, described main laser is placed with respectively post lens separately with the front end of sub-laser instrument described in each.
Further, the described optical device that again points to comprises stepped base, on each ladder of described base, be provided with a prism, described prism and described light beam are corresponding one by one, described prism carries out the deflection on x direction of principal axis by described light beam, the light beam that output overlaps on x direction of principal axis, described light beam at x-z with all parallel in y-z plane.
Further, the described optical device that again points to comprises stepped base, on each ladder of described base, be provided with a catoptron, described catoptron and described light beam are corresponding one by one, described catoptron carries out the deflection on x direction of principal axis by described light beam, the light beam that output overlaps on x direction of principal axis, described light beam at x-z with all parallel in y-z plane.
Further, the end face of described optical fiber is plane, hemisphere face, circular conical surface.
As shown in Fig. 1 to 8, a kind of semiconductor laser array well-balancedization of output beam of the present invention and fiber coupling system, a plurality of semiconductor laser elements 2, here only drawn for convenience of description 6 semiconductor laser elements with a determining deviation in the x-direction in a plane parallel being placed on heat sink 1, form one dimension semiconductor laser array.Each semiconductor laser element output beam 3 is propagated along the z direction vertical with x direction.
The fast axis collimation lens 4 of placing a high numerical aperture before each semiconductor laser, noise spectra of semiconductor lasers array output beam 3 collimates in y direction.After fast axis collimation lens 4, place in the z-direction a slow axis collimation lens 5, every sub-post lens of slow axis collimation lens are corresponding one by one with each semiconductor laser element, compress the angle of divergence of each conductor laser unit output beam 3 in x-z plane.
After slow axis collimation lens, in z direction, place an edge glass stack 6 vertical with z axle.This edge glass stack noise spectra of semiconductor lasers unit output beam 3 is offset in y-z plane.
This edge glass stack 6 is comprised of a plurality of prismatic lenses, and the number of prismatic lens can be consistent with semiconductor laser element number, also can be different.As shown in Figures 3 and 4, the edge glass stack of the present embodiment is comprised of three prismatic lenses 10,11 and 12, respectively corresponding two the adjacent semiconductor laser element output beams 3 of each prismatic lens.The plurality of prismatic lens is at the unusual close-packed arrays of x direction, and the width of each prismatic lens equals the twice that semiconductor laser element is arranged middle ware distance, guarantees that the interface of adjacent digonous eyeglass is positioned in the middle of two semiconductor laser elements.
The refractive index of the interior angle of prismatic lens, length and the optical material that adopts determines in y direction by the height of offset beam.Difference in height by adjacent two light beams of skew in y direction will be a bit larger tham semiconductor laser element light beam by the height in y direction after fast axis collimation lens.Due to semiconductor laser element light beam by fast axis collimation lens after height in y direction be conventionally less than 1 millimeter, being offset the difference in height of adjacent two light beams in y direction can be 1 millimeter.
The interior angle of middle edge eyeglass 11 can be 90 °, is arranged in as Fig. 1 and 2, and two of the centres light beam 3 of one dimension semiconductor laser array 1 is not offset after by middle edge eyeglass 11 in y direction.By choosing prismatic lens 10 and 12 suitable interior angle, length and optical materials, to make 1 liang of side beam 3 of one dimension semiconductor laser array be 1 millimeter in y direction side-play amount.Prismatic lens 10 can be identical with 11 interior angle, length and optical material, and in y-z plane, centered by y axle, axle mirror image is placed, make corresponding light beam 3 by after prismatic lens 10 and 12 in y direction offset direction contrary.
In z direction, place one points to optical device 7 to edge glass stack 6 again below, and these all offset beam of again pointing to 7 pairs of process edge glass stacks 6 of optical device are carried out deflection in x-z plane.This again points to optical device 7 and can be comprised of stair-stepping base 13 and prism 14.On base, the difference in height of adjacent ladder is consistent with the adjacent spaces by the rear ladder light beam of edge glass stack 6 bar.On each ladder, place a prism 14, prism 14 can be the reflecting prism of right-angle prism or other shape.The corresponding incident offset beam of each reflecting prism 14 is carried out the deflection of equal angular in x direction to incident offset beam, all offset beam are overlapped leaving after again pointing to optical device 7 in x direction, at x-z with all parallel in y-z plane.Light beam boundling and z direction after overshoot are angled, and this angle can be 90 °.
This again points to optical device 7 and also can be comprised of stair-stepping base 15 and catoptron 16.On base, the stagger height of adjacent ladder in y direction is consistent with the interval by rear two the adjacent ladder light beams of edge glass stack 6.On each ladder, place a catoptron 16.
In the direction vertical with beam Propagation direction, place a condenser lens 8 below again pointing to optical device 7.This condenser lens 8 can be a non-spherical lens, and non-ball surface is towards again pointing to optical device.This condenser lens is focused into a focus the light beam of well-balancedization, and focus is positioned at before the end face of coupled fiber 91, after end face surface or end face.
Finally it should be noted that: above embodiment is only for illustrating technical scheme of the present invention, not for limitation of the present invention, although the present invention is had been described in detail with reference to above-described embodiment, it will be understood by those skilled in the art that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not depart from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed within the scope of claim of the present invention.
Claims (6)
1. semiconductor laser array well-balancedization of output beam and fiber coupling system, it is characterized in that: described system comprises that equidistant parallel arrangement is some semiconductor lasers of one-dimensional array, the arragement direction of described laser instrument of take is x axle, perpendicular to described laser array arragement direction, be z axle, the light beam of described laser instrument output transmits along z direction of principal axis;
Described system also comprises fast axis collimation lens, slow axis collimation lens, the edge glass stack that described laser instrument device front end sets gradually and again points to the condenser lens that again points to the beam outlet of optical device described in optical device and correspondence, the beam outlet of described condenser lens is provided with optical fiber, wherein
Described fast axis collimation lens, for carrying out the light beam of laser instrument output described in each collimation on y direction of principal axis and by the parallel output of described light beam;
Described slow axis collimation lens, for carrying out the described light beam of described fast axis collimation lens output collimation on x direction of principal axis and by the parallel output of described light beam;
Described edge glass stack, for the described light beam of described slow axis collimation lens output is carried out being offset in y-z plane, and export described light beam, wherein the described light beam of parallel arrangement is divided into three parts, there is not skew output at y direction of principal axis in the light beam of center section, rightabout skew output occurs the light beam of two side portions;
The described optical device that again points to, for the described light beam of described rib lens output is carried out to the deflection of equal angular in x direction, the light beam that output overlaps on x direction of principal axis, described light beam at x-z with all parallel in y-z plane;
Described condenser lens, for the described described light beam that again points to optical device output is polymerized to a focus, described focus is inputted described optical fiber.
2. a kind of semiconductor laser array well-balancedization of output beam according to claim 1 and fiber coupling system, it is characterized in that: described fast axis collimation lens comprises into the collimation post lens that one-dimensional array is arranged, wherein, described main laser is placed with respectively collimation post lens separately with the front end of sub-laser instrument described in each.
3. a kind of semiconductor laser array well-balancedization of output beam according to claim 1 and fiber coupling system, it is characterized in that: described slow axis collimation lens comprises into the sub-post lens that one-dimensional array is arranged, wherein, described main laser is placed with respectively post lens separately with the front end of sub-laser instrument described in each.
4. a kind of semiconductor laser array well-balancedization of output beam according to claim 1 and fiber coupling system, it is characterized in that: the described optical device that again points to comprises stepped base, on each ladder of described base, be provided with a prism, described prism and described light beam are corresponding one by one, described prism carries out the deflection on x direction of principal axis by described light beam, the light beam that output overlaps on x direction of principal axis, described light beam at x-z with all parallel in y-z plane.
5. a kind of semiconductor laser array well-balancedization of output beam according to claim 1 and fiber coupling system, it is characterized in that: the described optical device that again points to comprises stepped base, on each ladder of described base, be provided with a catoptron, described catoptron and described light beam are corresponding one by one, described catoptron carries out the deflection on x direction of principal axis by described light beam, the light beam that output overlaps on x direction of principal axis, described light beam at x-z with all parallel in y-z plane.
6. a kind of semiconductor laser array well-balancedization of output beam according to claim 1 and fiber coupling system, is characterized in that: the end face of described optical fiber is plane, hemisphere face, circular conical surface.
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| CN201410045318.1A CN104049325A (en) | 2014-02-08 | 2014-02-08 | Semiconductor laser array output beam uniformizing and optical fiber coupling system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249422A (en) * | 2016-09-28 | 2016-12-21 | 北京万集科技股份有限公司 | Multichannel beam treatment optical system and processing method, multi-path laser detector |
| CN109491096A (en) * | 2018-12-24 | 2019-03-19 | 西安炬光科技股份有限公司 | Optical device, laser module and laser beam processing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030118291A1 (en) * | 2000-12-14 | 2003-06-26 | Brosnan Stephen J. | High brightness laser diode coupling to multimode optical fibers |
| EP1343036A2 (en) * | 2002-03-08 | 2003-09-10 | Toyoda Koki Kabushiki Kaisha | Optical waveguides, lens array and laser collecting device |
| US20050069255A1 (en) * | 2003-09-30 | 2005-03-31 | Kabushiki Kaisha Toshiba | Optical module, optical fiber laser device and image display device |
| CN101017306A (en) * | 2007-03-07 | 2007-08-15 | 中国科学院上海光学精密机械研究所 | Light beam shaping and coupling system of linear laser diode array |
| CN203811854U (en) * | 2014-02-08 | 2014-09-03 | 武汉柏汉激光技术有限公司 | Semiconductor laser array output light beam uniforming and fiber coupling device |
-
2014
- 2014-02-08 CN CN201410045318.1A patent/CN104049325A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030118291A1 (en) * | 2000-12-14 | 2003-06-26 | Brosnan Stephen J. | High brightness laser diode coupling to multimode optical fibers |
| EP1343036A2 (en) * | 2002-03-08 | 2003-09-10 | Toyoda Koki Kabushiki Kaisha | Optical waveguides, lens array and laser collecting device |
| US20050069255A1 (en) * | 2003-09-30 | 2005-03-31 | Kabushiki Kaisha Toshiba | Optical module, optical fiber laser device and image display device |
| CN101017306A (en) * | 2007-03-07 | 2007-08-15 | 中国科学院上海光学精密机械研究所 | Light beam shaping and coupling system of linear laser diode array |
| CN203811854U (en) * | 2014-02-08 | 2014-09-03 | 武汉柏汉激光技术有限公司 | Semiconductor laser array output light beam uniforming and fiber coupling device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249422A (en) * | 2016-09-28 | 2016-12-21 | 北京万集科技股份有限公司 | Multichannel beam treatment optical system and processing method, multi-path laser detector |
| WO2018058741A1 (en) * | 2016-09-28 | 2018-04-05 | 北京万集科技股份有限公司 | Multipath light beam processing optical system and processing method therefor, and multipath laser detector |
| CN109491096A (en) * | 2018-12-24 | 2019-03-19 | 西安炬光科技股份有限公司 | Optical device, laser module and laser beam processing method |
| CN109491096B (en) * | 2018-12-24 | 2021-08-06 | 西安炬光科技股份有限公司 | Optical device, laser module and laser beam processing method |
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Application publication date: 20140917 |